High-solids binder combinations for scratch-resistant topcoats

US7196134B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Christian Wamprecht · Neuss, DE
• Markus Mechtel · Neunburg vorm Wald, DE
• Jörg Tillack · Bensberg, DE
• Thomas Klimmasch · Leverkusen, DE

Key dates

• Filing date: May 14, 2004
• Grant date: Mar 27, 2007
• Expiry date: Dec 25, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D175/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

High-solids binder combinations comprising polyisocyanates, special lactone-based polyols and polyacrylate-polyols, a process for preparing such binders, and their use for producing coatings.The lactone-based polyols include ε-caprolactone-based polyols having an average hydroxy functionality ≧2 and a number-average molecular weight of from 119 to 2000 g/mol. The polyacrylate resins are prepared by copolymerizing optionally functional polybutadienes, aromatic monomers, hydroxyalkyl esters of acrylic or methacrylic acid having primary hydroxyl groups, aliphatic esters of acrylic or methacrylic acid and C1 to C8 monoalcohols, α,β-unsaturated C3–C7 monocarboxylic or dicarboxylic acids or of one or more monoesters of maleic acid or fumaric acid and C1 to C14 monoalchols.